GLPCTL007W
Failed to remove database instance: 'instance name'.
Explanation
The program failed to successfully remove the database instance.
This might have happened because the database instance did not exist.
User response
Verify that the database instance still exists on the system. This
can be achieved with the db2ilist command. If the database instance
has been removed, no further action is necessary. In addition, look in
the directory server's DB2 Command Log File and the directory
server instance's DB2 logs for additional errors or warnings
that might have been generated. If the configuration
tools continue to show this warning message, restart the computer and
try to produce the warning again before contacting IBM Software Support.